Ignition timer distributor



July 31, 1928. 1,678,913

L. o. PARKER IGNITION TIMER DISTRIBUTOR Filed A il 6, 1925 2 Sheets-Sheet 1 m wazw/ July 3l,1928. 1,678,913

L. O. PARKER IGNITION TIMER-DISTRIBUTOR Filed A pIil 6, 1925 2 Sheets-Sheet 2 a @Ql/ 77 Patented July 31, 1928. I

UNITED STATES PATENT OFFICE.

LESLIE O. PARKER, OF ANDERSON, INDIANA, ASSIGNOR, BY MESNE ASSIGNMENTS, TO DELCO-REMY CORPORATION, OF DAYTON, OHIO, A CORPORATION OF DELAWARE.

IGNITION TIMER DISTRIBUTOR.

Application filed April 6, 1925. Serial No. 20,949.

This invention relates to ignition timing apparatus for an internal combustion engine, and particularly to the type of apparatus which comprises a plurality of' engine operated circuit interrupters which are connected in parallel in the ignition primary circuit for the purpose of dividing the primary current between the pairs of interrupter contacts so the life of the contacts will be prolonged.

It is among the objects of the present invention to provide such improvements in construction as are conducive to durability and reliability in operation and economy in manufacture. More particularly it is an object to provide novel means for conducting current from an insulated primary terminal of the timer to the circuit interrupters while permitting one interrupter to be adjusted relative to the other and angularly relative to the cam.

A further object of the invention is to' provide for the removal in assembled relation from the timer housing of the interrupters and their supporting and adjusting devices and the means for conducting current to the interrupters.

Further objects and advantages of the present invention will be apparent from the following description, reference being had to the accompanying drawings, wherein a preferred form of embodiment of the present invention is clearly shown.

In the drawings:

Figs. 1 and 2 are plan and side views, respectively, of a timer-distributor embodying the present invention.

Fig. 3 is a plan view of a distributor head with the distributor head cover removed.

Fig. 4 is a bottom plan View of the distributor head cover.

Fig. 5 is a fragmentary view of the distributor taken on line 55 of Fig. 1.

Fig. 6 is a fragmentary view of the distributor head on line 66 of Fig. 3.

Fig, 7 is a plan view of the timer mechanism, the distributor headbeing removed.

Fig. 8 is a plan View of the breakerlever adjustable bracket.

Fig. 9 is a plan view of the'stationary bracket and of the current conducting bracket which is electrically connected with the braker levers.

Figs. 10, 11, 12, 13 and 14 are fragmentary .head 25.

sectional views taken on lines 10-10, 11-11, 1212, 1313 and 1414 of Fig. 7.

The timer-distributor includes a cup shaped housing having a shank 21 for supporting a drive shaft 22 having its lower end attached to an engine driven part not shown. By means of a speed responsive mechanism not shown, the shaft 22 is connected with a timer cam 23 and a distributor rotor 24. As well known to those skilled in the art, this speed responsive mechanism controls the angular relation between shaft 22 and the parts 23 and 24 according to the speed of the engine in order to advance and retard the spark automatically. The timer cup 20 supports a distributor head 25 which is retained by two spring clips 26 engaging bosses 27 provided by the distributor head 25. Each clip 26 is hingedly connected with the timer cup 20 by a hinge pin 28 around which the lower end of the clip 26 is bent, and by a hinge pin bracket 29 which is secured to the timer cup 20 by a screw 30 which passes through a hole in the side wall of the timer cup 20 and is threadedly con-' nected with a part 31 to be described later. (See Fig. 14.)

The distributor head 25 supports a center contact button 32 and an annular row of L- sha'ped' distributor posts 33. The -center button 32 cooperates with a resilient eon-1 'ductor 34 carried by the rotor 24 and attached by screw'35 to adistributor segment 36 which cooperates with the distributor posts 33. The parts 32 and 33 are connected with cable piercing conductors 37, which extend through the top of the distributor head and into insulated cable receiving grooves 38, provided in the top wall of the The grooves all extend toward one side of the distributor head so that the cables attached thereto may all be brought out from the head along one side thereof, The

wall of each groove 38 is provided with sharp Ll-shaped ridges 39, which bite into the insulation of the cables when they are clamped in the grooves 38 between the distributor head 25 and the distributor head cover 40. The distributor head 25 is provided with an annular groove 41 for receivmg an annular flange 42 of the head cover 40 in order to provide a water tight enclosure for the ends of the high tension cables. In order to reduce the amount of material recover is reinforced by webs 43, 44, 45, 46 and 47 which are so arranged that they will engage the ends of the cables close to that sec- I tion of each cable which is pierced by one of cate to what part the other ends of the 109 to provide clearance for the lower end ing and to also the points 37 The cover is provided with an annularboss 48 in alignment with the point 37 which is connected'with a center button 32[ The flange 42 of the cover is provided with notches 49 which correspond with the grooves 38 when thecover 40 is attached tothe head.25. i p a 'To connect the high tension cables with the distributor head, each cahlefis laid in one of "the grooves 38 which are marked with the numbersl to 6 inclusive in order to designate to which cylinder 'spark plug that particular cable should be connected. The center groove 38 is marked coil to designate that the cable therein is to be connected with the secondary terminal of the ignition coil. The end iof each cable.

is pushed down over one of the oints 37 so that the point will pierce 7 t rough the stranded wire of the cable. -Each cable is pressed firmly. down over the ridges 39 and the, cover 40 is mounted on the, .head 25, and attached by screws 50 which threadedly engage the head. The grooves 49 of thecover are shaped so as to press the rubber insulations of the cables firmly against the ridges 39 to prevent the cables from loosenrovide a substantially water tight joint w ere the cables enter between the parts 25 and 40. U

The cover 40 is also provided with the word coil and index numbers 1 to 6'and arrows pointing therefrom to the wires' leading from the apparatus'in order to indiwires are to be connected.

The parts 31 shown in Fig. 14, which are threadedly engaged by screws '30 for holding the distributor retainer clips 26, provide ears formed integrally with a stationary bracket or plate for supporting the latter within the timer cup 20. .As

- shown in Fig.

9 the bracket60supports a conductor 61' which is insulated from the bracket 60 by' nonconduct'ing plates 62 and from the rivets 63 which attach the parts 60 and 61, by nonconducting washers crime 65. (See Fig. 11.) Theconductor 61 includes a bridge 65 which is located within an opening 66 provided by the bracket 60 and which is rovided with a central opening, 67 of sufficient size to clear the cam 23. The conductor 61 includes an car 68 which is threadedly engaged by a terminal screw 69 which passesthrough a nonconducting block 70 having a shank 71 extending through a hole in the side wall of the. cup 20.-

Plate 60 carries a breaker lever pivot supported by the bracket 82 and the end of a leaf spring 83. The

spring 83 partly encircles the hub 73 and is attached by a screw 84 to an ear 85 extend ing from the conductor 61.

A breaker lever bracket or plate is 60 and is angularly adjustable thereon. The bracket 90 is provided with a central opening 91 for receiving the cam23 and with arcuate slots 92, each slot receiving a screw 93 which enages a tapped hole 94 in the plate 60. l3 loosening the screws 93, the bracket 90 may be shifted angularly and then secured in adjusted position by tightening the screws 93. The plate 90 is provided with notches 94 to provide clearance for the ends of the conductor 61, and with a notch 95 to provide clearance for the bracket 78 and one of the ears 31 of the bracket 60. Clearance for the other ear 31 is provided by a notch 96 in the bracket 90. Clearance for the stud 72 is provided by a hole 97 Bracket 90 carries a pivot stud 98, (see also Fig. 12) which supports the nonconducting hub 99 having a breaker lever 100. The hub is retainedby spring clip 101 engaging a groove 102 in the stud 98. Breaker lever carries a contact 103 for engaging a contact 104mounted on the end of an adjustin'g screw 105 which is carriedby bracket of screws 107 which may project below the surface of the bracket 90. (See Fig. 10.) The screw 105 is retained in adjusted position by a screw 110 which clamps the bracket 106 around the screw 105. A screw 111 carried by the bracket 78 has a similar function with reference to the contact carrying screw 77.

' The conductor 61 is provided with an ear 115 which is similar to the ear 85 and which is connected by screw 116 with one end of leaf spring 117 which partly encircles the hub 99 of lever 100'and is attachedto the lever by rivet 81 which also attaches a rubbing block '118 similar to the rubbing block 82. I A a A metallic condenser case 120 is attached .by screws 121 to the timer housing 20.

through which the screw 69 extends. The screw 69 is used also to attach a clip 125 of a conductor, 126 which is used to connect the primary coil of the ignition coil with the condenser and with the conductor 61 the cam 23 in order thatthe pair of contacts 103 and 104 may beseparated simultaneously with the separation of the contacts 75 and 76.

After removing the screw 69 and the two screws 30, the bracket 60 and all parts supported thereon may be removed in assembled relation while the cam and its driving mechanism remain assembled with the timer housing.

While the form of embodiment of the present invention as herein disclosed, constitutes a preferred form, it is to be understood that other forms might be adopted, all coming within the scope of the claims which follow:

What is claimed is as follows:

1. Ignition apparatus comprising, in combination, a housing including a cup-shaped member, a cam located centrally within the cup, circuit interrupters actuated by the cam and located within the housing on opposite sides of the cam, a conducting plate extending across the cup and insulated therefrom, means connecting the conducting plate in parallel relation with the interrupters and a terminal member extending into the cup and engaging the conducting plate.

2. An ignition device comprising in combination, a housing; a cam located centrally of said housing; a stationary bracket mounted in said housing; a plate adjustably secured to said bracket and in electrical engagement there-with; a bridging conductor extending across the bracket and insulatingly secured at both its ends to said bracket; an interrupter arm movably supported on, but insulated from said bracket; means for connecting the said arm to the bridging conduct-or; a second movable contact arm secured to, but insulated from, the plate;

means connecting the second contact arm to the bridging conductor; and stationary contacts carried on the bracket and plate adapted to be engaged by the first and second mentioned conductor arms respectively.

. 3. An ignition device comprising in combination, a housing; a cam located centrally of said housing; a stationary bracket sup ported in said housing; a plate adjustably secured to said bracket and in electrical connection therewith; a bridging conductor extending across the bracket and insulatingly secured at both its ends to said bracket; an interrupter arm movably supported on, but insulated from, the bracket; a second interrupter arm movably secured to, but insulated from, the adjustable plate; a stationary con tact secured to the'bracket and adapted to be engaged by the first mentioned movable contact arm'; a second stationary contact carried by the adjustable plate and adapted to be engaged by the movable contact arm supported on said plate; and springs for connecting the contact arms in parallel relation with the bridging conductor and for holding said contact arms in engagement with their respective stationary contacts.

4. Ignition apparatus comprising, in combination, a housing including a cup-shaped member,-a cam located centrally within the cup, a stationarybracket mounted within the cup, and having an aperture through its central portion, a bridging conductor having its end portions insulatingly secured to the bracket and its intermediate portion extending across the aperture of the bracket and provided with a central hole to permit placing the bracket and conductor around the cam, a plate adjustably secured to the bracket and shaped so as to provide clearance for the cam, cam-operated circuit inter rupters supported respectively by the bracket and plate, means for connecting the interrupters electrically with the bridging conductor, and means for detachably securing the bracket to the cup-shaped member.

whereby the bracket and parts supported thereon are removable in assembled relation from the cupshaped member.

In testimony whereof l hereto afi'ir; my signature. I

LE SLIE Q. PARKER. 

